Question 906424
two planes leave an airport the same time and travel in opposite directions. one plane averages 300 miles per hr, and the other plane averages 600 miles per hr. When will they be 2700 miles apart? 
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speed at which planes are flying apart from each other=300+600=900 mph
travel time=distance/speed=2700/900=3
When will they be 2700 miles apart? 3 hrs